So recently we've all started to prank each other. I live in a big student residence area, so houses are all kind of attached to the same building, nobody has got me yet, so its vital that I try and prank everyone so hard that nobody will try it with me.
I've laid down a few pranks so far, looking to know the best ones.
(People generally leave their doors unlocked, so its pretty much access all areas)
Today I put washing up liquid in my friend's toilet, when she flushed her toilet it soaked her floor in bubbles, and the more you flush, the messier it gets.
The other day I put vodka in my friends cough syrup, the day after (when he was hungover) he drank the bottle and came rushing into my house and lost his voice completely.
Please give more ideas.